4657668157 has 4 divisors (see below), whose sum is σ = 4662955836. Its totient is φ = 4652380480.

The previous prime is 4657668149. The next prime is 4657668167. The reversal of 4657668157 is 7518667564.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1825938361 + 2831729796 = 42731^2 + 53214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4657668157 - 2³ = 4657668149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4657668098 and 4657668107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4657668167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642518 + ... + 2644279.

It is an arithmetic number, because the mean of its divisors is an integer number (1165738959).

Almost surely, 2^4657668157 is an apocalyptic number.

It is an amenable number.

4657668157 is a deficient number, since it is larger than the sum of its proper divisors (5287679).

4657668157 is an equidigital number, since it uses as much as digits as its factorization.

4657668157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287678.

The product of its digits is 8467200, while the sum is 55.

The square root of 4657668157 is about 68247.1109791469. The cubic root of 4657668157 is about 1670.0245202993.

The spelling of 4657668157 in words is "four billion, six hundred fifty-seven million, six hundred sixty-eight thousand, one hundred fifty-seven".